Hoisting mechanism



Dec. 24, 1929.

R. c. oseoon 1,740,705

HOISTING MECHANISM Original Filed March 31, 1924 2 sh t -s 1 Dec. 24, 1929. R. c. OSGOOD HOISTING MECHANISM 2 Sheets-Sheet 2 Original Filed March 31, 1924 Patented Dec. 24, 1929 ATENT -FFICE ROBERT C. OSGOOD, F CLAREMONT, N EW I-IAIiIPSI-IIR-E, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS HOISTING MECHANISM Application filed March 31, 1924, Serial No. 703,308. Renewed February 25, 1929.

This invention relates to hoisting mechanisms.

It has for its object to provide an improved hoisting mechanism. A further object is to provide an improved hoisting mechanism having a single drum. Another object is to provide an improved single drum hoisting mechanism driven by an electric motor. It is also an object of my invention to provide an improved single drum hoisting mechanism having supporting standards therefor within one of which is mounted the electric motor for driving the drum. A still further object of my invention isto provide an improved hoisting mechanism wherein one end of the electric motor will always be accessible, such for instance as'the end carrying the brushes. Another object is to provide an improved single drum hoisting mechanism wherein part of the driving motor therefor projects into the drum and the remaining part is directly accessible, a further object being to provide an improved supporting standard for said motor and drum.

In the accompanying drawings 1 have shown for purposes of illustration two forms which my invention may assume in practice.

in these drawings,

Fig. 1 is a partial vertical longitudinal section.

Fig. 2 is a left hand end elevation.

Fig. 3 is a detail view of a modified form of supporting clamp.

In the illustrative forms of my invention I have shown the same as comprising a base 1 having a central semi-cylindrical recess 1 which is particularly adapted to engage a supporting column or the like. Projecting upwardly from each end of said base are standards 2 and 3, the latter of which, as shown in 2, comprises enlarged cylindrical clamping members 4 and 5 held together as by screws 6. It will be noted that the respective clamping members are split on the diagonal, thus causing the screw lugs 7 to be thrown substantially within the outer limits of the hoist. It is to be understood from Fig. 1 that said clamping members are hollowed out as at 8, thereby presenting a minimum cylindrical clamping surface 9 be used in connection with the bands 18.

adapted to engage the periphery 10 of the electric motor casing 11.

The casing is not disposed symmetrically with respect to the clamping members but has its inner end projecting a substantial distance to the side of said' members. Upon this inner end is mounted the drum 12 which has a radial flange member 13, the inner periphery of which is recessed in order to receive an annular bearing sleeve 14 within *hich rollers 15 are mounted, the latter en- ;aging a bearing sleeve 16 mounted on the 23 has a radial flange 24 fixed to an annular flange 25 as by screws 26. Said flange 25 has an annular groove 27 within which is mounted usual brake bands 28 actuated by any suitable lever mechanism such as might will thus be seen that the drum 12 is rotatably supported at one end on the motor casing and at its other end within the standard 2 as by the bearings 22 and shaft 23. Access to the outer end of the bearings 22 is had by removing an end cover 29 which has a reservoir 30 to which lubricant can be supplied as by a removable plug 31. Suitable means are provided for preventing escape of lubricant 32 disposed within the drum for gear transmission elements, to be later described, which comprises an inwardly projecting flange 33 adapted to cover one end of the roller bearings 15 and an annular flange 3e projecting over part of the clamping members i and 5 and made dust and oil leak proof as by a suitable packing 35.

The particular means for driving the drum from the motor comprises a pinion 36 fixed to the rotatable shaft of the armature 37.

Pinion 36 meshes with gear 38 fixed upon a rotatable shaft 39 that carries a pinion 40 in turn meshing with a gear 41 fixed upon a shaft 42 rotatably mounted in spaced bearings 43 carried by the transverse member 19, formed with said shaft 42 is a pinion 44 adapted to mesh with a suitable idler gear, not shown, carried by the transverse member 19, which idler gear in turn meshes with the internal gear 45 mounted on the inner periphery of the annular portion 25. The latter is rotatably supported, as has been previously described in the standard 2 by the hollow stub shaft 23.

The outer end of the motor has a usual end cover 46 detachably secured thereto as by screws 47 and which carries the bearings for the armature shaft, the outer end of said shaft being covered as by a cap 48 having a lubricant means 49. Mounted within the motor 11 are brushes 50 so constructed that upon removal of the end cover 46 the brushes will remain in their operative position. If it is desired to remove the motor casing of the form shown in Fig. 1, the stud bolts which hold the standard 2 upon the base 1 will be removed, which allows the whole drum mechanism to be bodily removed along with the standard 2 from the motor casing. The upper portion 5 of the split clamp will then be removed, the diagonal separation thereof allowing the motor casing to be removed in a direction substantially in alignment with the axis of the terminal plug connection 51,

' the lead wires being first disconnected therefrom. By the direct movement of the, casing, the lead wires are not twisted or liable to breakage. If it is desired to merely inspect the brushes, the end 46 may be removed without disturbing the remaining structure.

In the modified form shown in Fig. 3 it is possible to remove the motor casing without disturbing the drum structure or gear mechanism, it being noted that the periphery of the motor casing is substantially flush with the outer periphery of the annular bearing race 16, so'that it will be possible to remove the motor casing directly from the standard 3 by slightly loosening the clamp bolts 6. To remove the motor casing, the lead Wires terminating in the plug connection 51 will be disconnected therefrom and shoved into the motor housing and the split clamps slightly loosened, whereupon the motor may be readily longitudinally moved. Upon inserting the motor, the casing end 46 will be removed; and after the motor casing is in place, the lead wires may be shoved outwardly through the wire openings in the plug 51 and reconnected thereto. This mode of operation will not alter the operative position of the drum 12 for the flange 34 will still engage the clamp members, thus permitting the motor casing to be freely inserted or removed with respect to the drum. The split clamp is also used in connection with this form, for it may be desired to use the feature of each in this same machine.

While I have in this application specially described two forms which my invention may assume in practice, it will be understood that these forms of the same are shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. A hoisting mechanism comprising a winding drum, an electric motor for drivin the drum providing a bearing for the latter, said motor having a casing and lead wires extending through said casing, and rigid supporting means for said motor having an opening through which said wires extend, said motor casing being adapted upon release from the supporting means to be removed from said supporting means in a direction angularly disposed to the longitudinal axis of said motor and substantially parallel to the axis of said wires as they extend in said opening.- v

2. A hoisting mechanism comprising a drum, a driving motor therefor providing a drum bearing and having associated therewith a radially extending element for transmitting a motor actuating medium, and rigid supporting means for said motor adapted to receive said radial element, said motor being adapted upon release from the supporting means to slide from said supporting means in a direction substantially parallel to said radial element and transverse to its own axis whereby distortion of said element during removal is avoided.

3. A hoisting mechanism comprising a winding drum, an electric motor for driving the drum providing a bearing for the latter, means for rigidly supporting said motor including a split clamp surrounding said motor, and a projecting current carrying lead extending radially from the motor and associated with said supporting means, said motor casing being adapted-upon release from the supporting means to be removed directly from said supporting means in a direction transverse to its axis so that said radially extending lead will be moved from said supporting means in a direction substantially parallel to the axis of said radially extending lead whereby distortion of said lead during removal is avoided. I

4. A hoisting mechanism comprising a drum, an electric motor providing a drum bearing, rigid supporting means for the motor, and a projecting current carrying element extending radially from the motor and associatedwith said supporting means, said motor casing being adapted upon release from the supporting means to be removed directly from said supporting means in a direction transverse to its axis so that said radially extending element will be moved from said supporting means in a direction substantially parallel to the axis of said radial element whereby distortion of said element during removal is avoided.

5. A hoisting mechanism comprising a motor having a stationary casing providing a cylindrical bearing surface on its periphery, means surrounding said casing to removably support the same, a winding drum having at one end an internal bearing surrounding and journaled on said bearing surface on the periphery of said casing, and means separate from said casing for supporting the other end of said drum, said motor casing being adapted upon release from its support to slide through said support while said drum is retained substantially in its normal supported position, said drum having an annular flange surrounding and in close proximity to the outer surface of the casing supporting means, thereby permitting supporting relation be tween said drum and casing supporting means when said motor casing is removed, and said casing supporting means comprising relatively movable sections, one of which is bodily removable to provide an opening, through the space normally filled by said section, through which said casing can be removed in a direction transverse to the motor axis.

6. A hoisting mechanism comprising a winding drum having at one end an internal bearing, a driving motor contained within a generally cylindrical motor casing, said casing providing on its periphery a cylindrical bearing surface for engaging said internal bearing whereby a plane transverse to the drum axis and passing through said bearing and bearing surface would cut through the body of said motor, a motor support surrounding said casing to clamp and support the same, a section of said support being bodily removable to release said casing and to provide an opening, through the space normally filled by said section, through which said casing can be removed in a direction transverse to the motor axis, and means separated from said casing for supporting the other end of said drum.

7. A hoisting mechanism comprising a winding drum having at one end an internal bearing, a driving motor contained within a generally cylindrical motor casing, said casing providing on its periphery a cylindrical bearing surface for engaging said internal bearing whereby a plane transverse to the drum axis and passing through said bearing and bearing surface would cut through the body of said motor, a motor support surrounding said casing to clamp and support the same, a section of said support being bodily removable to release said casing and to provide an opening, through the space normally filled by said section, through which said casing can be removed in a direction transverse to the motor axis, and means separated from said casing for supporting the other end of said drum, said motor casing having a removable end section adapted to be removed without detaching said motor casing from said support.

8. A hoisting mechanism comprising a motor having a stationary motor casing, a motor support surrounding one end of said casing to clamp and support the same, a section of said support being bodily removable to release said casing and to provide an opening, through the space normally filled by said section, through which said casing can be removed in a direction transverse to the motor axis, a winding drum having at one end an internal bearing, said motor casing providing closely adjacent said support a cylindrical bearing surface for engaging said internal bearing, and means separated from said casing for supporting the other end of said drum.

9. A hoisting mechanism comprising a motor having a stationary motor casing, a motor support surrounding one end of said casing to clamp and support the same, a section of said support being bodily removable to release said said casing and to provide an opening, through the space normally filled by said section, through which said casing can be removed in a direction transverse to the motor axis, a winding drum having at one end an internal bearing, said motor casing providing closely adjacent said support a cylindrical bearing surface for engaging said internal bearing, and means separated from said casing for supporting the other end of said drum, said motor casing having a removable end section adapted to be removed without detaching said motor casing from said support.

10. A hoisting mechanism comprising a motor having a stationary motor casing, a motor support surrounding one end of said casing to clamp and support the same, a section of said support being bodily remov able to release said casing and to provide an opening, through the space normally filled by said section, through which said casing can be removed in a direction transverse to the motor axis, a winding drum having at one end an internal bearing, said motor casing providing closely adjacent said support a cylindrical bearing surface for engaging said internal bearing, and means separated from said casing for supporting the other end of said drum, said drum having an end flange approximately engaging said motor support.

In testimony whereof I aflix my signature.

' ROBERT C. OSGOOD.

CERTIFICATE OF CORRECTION.

Patent No. 1,740,705. Granted December 24, 1929, to

ROBERT G. OSGOOD.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 5, strike out the comma and insert a period, and line 6, for "formed" read "Formed"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 13th day of May, A. D. 1930.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

